Fountain-pen.



PATENTBD MAR. i3, 1906.

J. R. ROBNSON. FNTIN PEN.

Aumentan' NLRB 553.13, 1905.

INVNTDS BY ATTOBN EY Y m B F.

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FOUNTAINPEN.

Specilicaton of Letters Patent.

Application filed March 18,1905. Serial Noi 250,768.

Patented March 13, 1906.

.T0 all whom t may concern,.-

Be it known that l, JOHN R. ROBINSON, a citizen of the United States, residing at Elmire, in the county of Chemung end Stete of New York, have invented certein new and useful Improvements in Fountain-Pens, of which the following is a specilicntion.

This invention relates to improvements in penliolders, wherein a barrel for containing s writing fluid is provided et one end with a pen and with means for feeding the fluid from the barrel to the pen 3 and the objects of in f improvements are to provide means for c justing the feed-bar along the pen to regulate the flow of ink to the nibs, to provide means for regulating the admission o air to the top of the barrel, and, finally, to provide e lling \device which may be carried attached to the holder or may be detached tnerefrofn and whereby the barrel may be charged with firs Writing fluid Without detnching the scintsection and Without fear of soiling the lingers or spilling the iiuid.

I attain my objects by arran'ing the several parts of the penholder as illustrated in the accompanying drawings, in which-- Figure 1 represents e longitudinal section of a complete fountain-pen embodying my improvements upon an enlarged scale; Isig. 2, e transverse section of thc seine on the line :n drown to a still larger sosie, 3 and 4,

e rear end view and longitudinal see-tion, re-Y spectivelr, of the feed-adjusting sleeve; Fig."

5, en en view of the point-section and a justing-sleeve with the pen and feed-bar in transverse section on the line y y in Fig. 1; Fig. 6, longitudinal and transverse sections of the feed-ber Fig. 7, an end vies-Y of the borrel on the line z z in Fig. 1 with the cap O removed; Fig. 8, a sectional view of sn auxil- 1a frtliin the holder, and Fig. 9 e modified form of the filler.

Like letters of reference designate like parts in the several views.

T e body of the penholder consists of s barre A, made of hard rubber or other suitable material and forming a reservoir for the Writing fluid. Into the end of this barrel is screwed the point-section B, which is provided with a longitudinal duct or passage- Wayl adapted to receive the feed-bar C and wit a socket to receive the pen D. Within the outer end of the uint-section is e revoluble sleeve E, provi ed with internal screwvnfthroedsnedented .tcdeneaseVA corresuondi.;

'until the full opening to the ehennel J in t cap for use when the filler is detached threads out upon the outside of the feed-bar C. In order to hold seid sleeve in revoluble relation to the point-section, I provide the sleeve with lenges F and G at front and resr, the flange' G being adapted to engage e corresponding internal groove formed in the point-section when the flange F is brought into engagement with the outer rini of said section, and in order to so assemble the parte I provide the sleeve with lono'itudinn slits H, whereby the sides of the sleeve may be s rung together sufficiently to allow the enge G to be slipped into lace within the point-section. The feeder is provided with the longitudinal channel J, through which the ink flows to the en, the ink being admitted to said channel orn the barrel by Way of the orifice I at the inner end of the duet in the point-section. This orice l corresponds in shape to the rear end of the feedbnr, and the curved central portion thereof is projected into the duct toward the outer end of the point-section in the form of e wedg, e

feed-bar is attained, es shown in Fig. i.

To adjust the feed, the sleeve E is turned Y by means ofthe flange F, thereby moving the feed-ber C toward or away from the point of the pen. As the feed-bar is retracted it will be evident that by reason of the wedge `formed belenr the critics I the duct leading ffroni the barrel to the pen will be gradually constricted until the rear end of the feed-bar is moved inward a suicient distance to coinpletely fill the orifice, in which position of the feed-ber flow from the barrel will be cornpletely shut o. By this arrangement of the feed-ber and the gradually-constrictcd {inidconduit I cbtein s double adjustment for the flow of init to the en, since it will be evident that es the end o the feed-bar is advanced nearer the point of the pen (which naturally causes the ink to flow more freely from the nibs) the essegc-way from the oriiiceI to the chennel Y will also be increased in size, thereby admitting a lar er sup y ly of ink to said channel to moet the eman at the point of the pen. As the feed-bar is moved inward or away irom the point of the pen the assage-way to the channel J will be restricts in size, thereby causing a lessened delivery of the ink to the pen in conformity with t e lessened demend. The feed-bar C therefore acts also as e valve, and the (point of delivery to the pen is moved towar or away from the nibs intheeorresncnidnisincreessondsclrnse IOO flow from the barrel, When moved toits innermost position, the feed-bar stops the flew completely, and the pen may be carried point downward or in any other position without fear of leakage. 1n order that the ink may flow from the barrel readily and in conformity with any adjustment of the feed-bar, I provide means at the top of the barrel for admitting air above the fluid in proportion to the flow through the feed. For this purpose I provide, near the upper end of the barrel, a diaphragm L, through which pass a number of holes M around a central conical plug N. A screw-cap O is fitted into the end of the barrel beyond the diaphragm and is provided with a central conical bore to fit the plug. A screw-threaded hole passes from this conical bore to the top of the cap, and it will be evident that air passin through this opening will be admitted to t 1e top of the barrel throu h the holes N to a greater or less degree, e ending upon the position of the cap O witi relation to plug When the cap is screwed into close engagement with said plug, the air admission will be e11- tirely closed off, and by turning the cap slightly a very small amount of air may be admitted, the quantity increasing with the degree of rotation imparted to the cap. Into the screw threaded end of the cap O is screwed a second cap P, which in Fi 1 is shown provided with a rubber bulb Q or use in filling the barrel. This cap P has its screw-threaded stem provided with a number of transverse holes, and thereby air in greater or less quantities may be admitted to the bore of the cap O, In order to protect the parts as so arranged, especially the bulb Q, I provide a cap R, which will be retained in place upon the barrel, except when adjusting the air-vent or when filling the pen. This cap is provided at vW with an air-vent by which air is admitted around the bulb to the holes in the cap P. By this arrangement the amount of air admitted into the first cap O through the second cap is regulated by the number of holes exposed by screwing the cap P outward, and the amount of air admitted to the barrel is in turn regulated, as before stated, by the adjustment of the cap O with respect to the lug N. By the use of these two caps there ore the amount of air admitted can be regulated to a very fine degree. If desired, however, the cap P may be dispensed with when using the pen, the vent adjustment being accomplished entirely throu h the ca O. Also instead of usin the cap I), provi ed with the filler-bulb Q, I may use a plain cap, as shown in the cap S in Fig. 8, this cap being removed and the filler-cap P inserted when it is re uired to fill the pen.

To fill the pen, t e cap P, Will be screwed out sufficiently to ive a vent for the air in the bulb Q, the cap will be screwed in tight, the bulb will next be compressed, and the cap P screwed in to close the vent-holes. 'lhe pen will then be placed with the lower end of the feed-bar in the ink, and the cap O being turned to open position the expansion of the bulb will cause the ink to be drawn into the barrel. If the bulb does not fill the barrel at one operation, by again unscrewing ca P, closing cap O, and compressin the bul the air may be expelled from the ulb without driving the ink from the barrel, and more ink may be drawn into the barrel upon properly adjusting the caps and again expanding the bulb.

Instead of using a collapsible rubber bulb for the ller I may use a cylinder, such as shown at Tin Fig. 9, provided with a piston U, adapted te be operated b means cfa button V, attached to the en of a piston-rod passing out through the end of the cylinder, the ink being drawn into the barrel of the pen by reciproeatin the piston U after adjusting the vent througgh the screw-threaded stem of the cylinder T in the same manner as described in connection with the bulb-filler. With this cylindrical type of filler the rotesting-cap R will not be required. It Wi lbe understood that either form of filler may be detached from the penholder when usin it in writing, and the cap, which is shown in Pig. 1 as covering the point-section, may be transferred to the upper end of the barrel, as in the pens now in common use. This vent and filling device is made the subject-matter of a separate application.

With a pen so made a very fine adjustment of the feed may be attained to conform with the different characters of work to be done, and the ink will flow to the last drop in the barrel. The vents at both ends of the barrel may be closed when the pen is not in use, so that the pen can be carried in any position without fear of leakage. Preferably all the parts of the penholder will be made of hard rubber, although other materials may be used if found desirable. The pen and feed-bar may also be otherwise arran ed relatively to one another than as I have herein described and illustrated.

Havin r thus described my improvements, what l c aim as my invention, and desire to secure by Letters Patent, is-

1. In a fountain-pen, the combination, with a barrel and a pen fixed at one end thereof, of a point-section for carrying said pen having a duct leadin from the barrel to the pen, a feed-bar mova le in said duct provided with screw-threads on its outer side, and a revoluble sleeve mounted on the end of the barrel and provided with screw-threads jp engagement with the threads on the feed- 2. In a fountain-pen, the combination, with a barrel, of a oint-section screwed into one end thereof an having an annular groove running infrom the outer end and terminating IOO in an enlarged bore, a pen fixed in the pointseetion, sind oint-seetion having a, duct leadn from t e barrel to the pen, a feed-bar movale in said duet provided with screwthreads on its outer side, e seeve having a split flan ed portion adapted to be sprung into revouble engagement with the groove in the end of the point-section, anti screwthreeds on the sleeve to engage the threads on the feed-bar.

3. In a fountain-pen, the combination, with e barrel and a pen xed et one end thereof, of a, point-Section for carrying said pen having a, semioireular duet provided with a wedge-shaped bore which forms a. :5

duct when in retracted position, and means zo for projecting and retrectin the feed-ber.

In testimony whereof4 I ave affixed my signature in presence of two Witnesses.

JOHN R. ROBINSON.

Witnesses M. E. VERBECK, A. S. DIVEN. 

